After rescheduling the recurring appointments after proxying to the user account , do not delete the older appointments

The groupwise agents and the groupwise clients are on gw 7.0.2 hp1a.

1) Create an user and provide proxy rights to another to modify the appointments.
2) Proxy into the appointments and send send recurring appointments to multiple users.
3) Have the users accept the appointments.
4) After few days say 15 to 20 days , again proxy into the account and reshedule the appointments. The older appointments do not get deleted.